Abstract:
Various embodiments of the present invention relate to plasmonic electric-field concentrators and to systems incorporating the plasmonic electric-field concentrators to perform Raman spectroscopy. In one aspect, a plasmonic electric-field concentrator comprises two or more large features, and a relatively small feature similar in shape to large features positioned adjacent to the two or more large features. The features are arranged so that when light of an appropriate wavelength is incident on the features, surface plasmon polaritons form on the outer surfaces of the features. The surface plasmon polaritons have associated electric fields extending perpendicular to the surfaces of the features. The electric fields are concentrated in the space between features forming an electric field hot spot that enhances Raman scattered light emitted from an analyte proximate to or absorbed on the features.
Abstract:
A sensor array for sensing at least one of chemical moieties and biological moieties is provided. The sensor array comprises a plurality of working electrodes electrically associated with a reference electrode, each working electrode in combination with the reference electrode forming a transducer. Each working electrode is provided with a coating of a sensing element comprised of an ionizable moiety and a functional group sensitive to one of the chemical and/or biological moieties.
Abstract:
A method of forming an electrical interconnect, which includes a first electrode, an interlayer of a programmable material disposed over at least a portion of the first electrode, and a second electrode disposed over the programmable material at a non-zero angle relative to the first electrode. The interlayer includes a modified region having differing electrical properties than the rest of the interlayer, sandwiched at the junction of the first electrode and the second electrode. The interlayer may be exposed to a focused beam to form the modified region.
Abstract:
A method of positioning a catalyst nanoparticle that facilitates nanowire growth for nanowire-based device fabrication employs a structure having a vertical sidewall formed on a substrate. The methods include forming the structure, forming a targeted region in a surface of either the structure or the substrate, and forming a catalyst nanoparticle in the targeted region using one of a variety of techniques. The techniques control the position of the catalyst nanoparticle for subsequent nanowire growth. A resonant sensor system includes a nanowire-based resonant sensor and means for accessing the nanowire. The sensor includes an electrode and a nanowire resonator. The electrode is electrically isolated from the substrate. One or more of the substrate is electrically conductive, the nanowire resonator is electrically conductive, and the sensor further comprises another electrode. The nanowire resonator responds to an environmental change by displaying a change in oscillatory behavior.
Abstract:
The present invention generally relates to an edge deletion module positioned within an automated solar cell fabrication line. The edge deletion module may include a grinding wheel device for removing material from edge regions of a solar cell device and cleaning the edge regions of the solar cell device after removing the material. The edge deletion module may also include an abrasive element, a portion of which is ground as it is periodically, laterally advanced toward the grinding wheel device. A controller is provided for controlling the operation and function of various facets of the module.
Abstract:
Various aspects of the present invention are directed to photonic devices configured to control transmission of electromagnetic radiation through a resonator structure. In one aspect of the present invention, a photonic device includes at least one electromagnetic resonator and a state-change material operably coupled to the at least one electromagnetic resonator. The state-change material is capable of being reversibly transitioned between a high-resistivity state and a low-resistivity state, with a ratio of the resistivity of the high-resistivity state to the resistivity of the low-resistivity state being at least about 100. Transmission of electromagnetic radiation through the at least one electromagnetic resonator at an operational frequency is controllable by transitioning the state-change material between the high-resistivity state and the low-resistivity state. Methods for controlling transmission of a signal are also disclosed.
Abstract:
Structures for amplifying light include a resonant cavity in which an analyte may be positioned. The structures for amplifying light may be used to amplify the incident light employed in surface enhanced Raman spectroscopy (SERS). SERS systems employing the structures for amplifying light of the present invention and methods of performing SERS are also disclosed.
Abstract:
An optical sensor is provided, comprising (a) a silicon nanowire of finite length having an electrical contact pad at each end thereof; and (b) a plurality of self-assembled molecules on a surface of the silicon nanowire, the molecules serving to modulate electrical conductivity of the silicon nanowire by either a reversible change in dipole moment of the molecules or by a reversible molecule-assisted electron/energy transfer from the molecules onto the silicon nanowire. Further, a method of making the optical sensor is provided. The concept of molecular self-assembly is applied in attaching functional molecules onto silicon nanowire surfaces, and the requirement of molecule modification (hydroxy group in molecules) is minimal from the point view of synthetic difficulty and compatibility. Self-assembly will produce well-ordered ultra-thin films with strong chemical bonding on a surface that cannot be easily achieved by other conventional methods.
Abstract:
A method for increasing adhesion between a substrate and a polymeric imprintable material during an imprinting procedure. The method includes chemically bonding a plurality of molecules to a surface of a substrate to form a self-assembled monolayer thereon. A monomer is copolymerized with the self-assembled monolayer to form a polymeric imprintable material that is chemically bonded to the self-assembled monolayer. Adhesion between the polymeric imprintable material and the substrate is substantially increased by the self-assembled monolayer.
Abstract:
Packaged NERS-active structures are disclosed that include a NERS substrate having a NERS-active structure thereon, and a packaging substrate over the NERS substrate having an opening therethrough, the opening in alignment with the NERS-active structure. A membrane may cover the opening in the packaging substrate. In order to perform nanoenhanced Raman spectroscopy, the membrane may be removed, and an analyte placed on the NERS substrate adjacent the NERS-active structure. The membrane may be replaced with another membrane after the analyte has been placed on the substrate. The membrane may maintain the pristine state of the substrate before it is deployed, and the replacement membrane may preserve the substrate and analyte for archival purposes. Also disclosed are methods for performing NERS with packaged NERS-active structures.